Low Carbon Heating System Design and Installation for Council Offices

A local authority is seeking design proposals for replacing gas-fired heating with low carbon alternatives at their 50,000 sq ft office building. The building features traditional stone construction with steel frames and glazing, currently heated by gas boilers serving radiators and wet central heating system, with local air conditioning units in meeting rooms and critical areas. The council recently installed 150 kW solar PV with 180 kWh battery storage (generating 145,000 kWh annually) and consumes approximately 425,000 kWh of gas per year for heating with peak demands of 28-34 kW. The council seeks design-led solutions exploring air source heat pumps, ground source heat pumps, hybrid systems with existing boilers, low temperature heating strategies, modest fabric improvements, and integration with existing renewable energy infrastructure. Proposals should include technical approaches, capital costs, operational savings, carbon reduction estimates, payback periods, delivery timelines, and risk assessment. The council prioritizes solutions that minimize disruption, leverage existing infrastructure effectively, and demonstrate both financial and carbon payback metrics.